IM-P343-35 CTLS Issue 5
28
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TRANSLATION RUN OVER
SP500 Electropneumatic Smart Positioner
Fig. 45
¼" NPT air supply (supply)
¼" NPT air signal to
actuator (output 1)
5.4 Air supply and connections
WARNING: Supply air pressure must not exceed the maximum allowable air pressure of the actuator.
Air connections should be ¼" NPT for air supply (supply) and output signal to actuator (Figure 45).
The supply air should be between 1.4 bar g minimum and 6 bar g maximum and be oil and dust free to IEC
60770. Mains air supply may sometimes contain traces of dirt, rust, water, oil and other deposits with the
potential for contaminating the internals of the positioner. It is therefore essential that a filter/regulator is
fitted in the mains air supply to the positioner.
The filter/regulator should have a coalescing filter or suitable compressed air pipework is used.
Fig. 46
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